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The hand in space is really part of pulsar PSR B1509-58. It used to be a star that collapsed on itself due to gravity to a mere 12 miles in diameter. So you can imagine how powerful this piece of matter is and the amount of energy it releases into space as the extremely powerful magnetic field directs subatomic particles like electrons outwards creating x-rays. The "blue hand" is a result of these x-rays from the pulsar and was revealed by the Chandra X-ray Observatory. It is a great example of a simulacrum. This one will likely be used for a lot of astronomy posters.
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